<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>diwen</title>
	<style type="text/css">
	.box{
		width:800px;
		height:3000px;
		background:red url() 0 0 no-repeat;
		margin-top:200px;
		position:absolute;
		top:10px;
		left:100px;
	}
	.son{
		width:200px;
		height:200px;
		background:blue url() 0 0 no-repeat;
       position:absolute;
        z-index:4;
        left:600px;
        top:0px;
		
	}
	.son1{
		width:600px;
		height:200px;
		background:orange url() 0 0 no-repeat;
		z-index:5;
		position:absolute;
		top:0px;
		left:0px;


	}
	.son2{
		width:900px;
		height:200px;
		background:gray;
		position:absolute;
		z-index:7;
	}
		.son3{
		width:800px;
		height:200px;
		background:white;
		position:absolute;
		z-index:7;
		top:20px;
	}
		.son3{
		width:800px;
		height:200px;
		background:white;
		position:fixed;
		z-index:7;
		top:20px;
	}

	</style>
</head>
<body>
<div class="box">
	<div class="son"></div>
	<div class="son1">111</div>
	<div class="son2">2222</div>
	<div class="son3">3333</div>
	<div class="son4">555</div>
</div>
	
</body>
</html>